I am a hybrid hydrogeologist/sedimentologist: I conduct interdisciplinary research in the emerging field of aquifer sedimentology. My aim is to understand the influence of subsurface heterogeneity on hydrologic system function and water resource sustainability. Heterogeneity plays a critical role in determining patterns of stream-aquifer interaction, contaminant transport, and groundwater response to land use changes, climate changes, and pumping. I use geophysical tools, field methods, and computer models to produce 3-D renderings of aquifer systems. 3-D models provide insight to the interconnections between the land surface and the subsurface. My current focus is on characterizing the High Plains/Ogallala aquifer system in areas of intensive water use and semi-arid climate, with the goal of improving the physical representation of aquifer heterogeneity in coupled groundwater/surface-water models.